Check your garden carefully for newly sprouted saplings every day or about every day, particularly during rainy seasons.
Pull up each weedy sapling by its roots as soon as you see it. Use your hand or hands for the task.
Dig up bigger saplings by using a spade. Doing so isn’t difficult because very young trees don’t have well-developed root systems.
Dispose of the removed saplings in the trash. Don’t add them to a composting bin or compost pile because they may survive, root and begin to grow in that fertile environment.
Break up your garden's soil with a hoe or cultivating fork at least once weekly. Most viable weed and tree seeds reside within the top 1 inch of garden soil, which allows them access to enough light and nutrients for successful sprouting. Regular cultivation turns up the seeds and exposes them to the elements, destroying them in the process.
Cover all non-planted areas of your garden with a double thickness of newspaper. Newspaper prevents light from reaching the soil but allows water to seep into the soil. Cover the newspaper with a 2- to 3-inch layer of mulch. This strategy keeps tree and weed seeds in the soil from sprouting while maintaining a tidy appearance in the garden.